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1 January, 12:34

19. What is the probability of tossing a penny and landing on heads two times in a row?

20. The area of one playing card is 24 square centimeters. 52 cars are stacked on top of each other to make a deck. What is the volume of that solid deck?

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  1. 1 January, 12:51
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    19).

    The probability of landing on heads the first time is 1/2.

    The probability of landing on heads the second time is 1/2.

    The probability of landing on heads both times is

    (1/2) · (1/2) = 1/4 = 25%.

    20).

    The volume of the solid deck is

    (length · width) · (height)

    = (24 cm²) · (52 · the thickness of each car).
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